/**
 * 
 * NOTICE -- YOU MUST LEAVE THIS NOTICE IN PLACE.  PER THE TERMS OF THE LICENSE BELOW, YOU MAY SUBLICENSE THIS SOFTWARE 
 * IN ANY WAY THAT DOES NOT CONFLICT WITH THIS LICENSE.
 *
 * Copyright (c) 2011, Paul Gribben <paul.gribben@gmail.com>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the 
 *       documentation and/or other materials provided with the distribution.
 *	
 *	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 *	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 *	DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
 *	SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 *	WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 *	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
package org.softwise.rss2kindle.impl;

import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.softwise.rss2kindle.adapters.BBCNewsAdapter;
import org.softwise.rss2kindle.adapters.BBCSportAdapter;
import org.softwise.rss2kindle.adapters.GuardianRssAdapter;
import org.softwise.rss2kindle.adapters.NewScientistAdapter;
import org.softwise.rss2kindle.model.RssAdapter;

public class FeedWriterFactory {
	private static FeedWriterFactory instance = new FeedWriterFactory();
	private List<RssAdapter> adapters = new ArrayList<RssAdapter>();
	
	private FeedWriterFactory() {
		adapters.add(new GuardianRssAdapter());
		adapters.add(new BBCNewsAdapter());
		adapters.add(new BBCSportAdapter());
		adapters.add(new NewScientistAdapter());
	}
	
	public static FeedWriterFactory getInstance() {
		return instance;
	}

	public RssAdapter getRssAdapter(String url)
			throws Exception {
		URL rssUrl = new URL(url);
		
		for (RssAdapter adapter : adapters) {
			if (adapter.isRssConsumer(rssUrl)) {
				return adapter;
			}
		}
		
		throw new UnsupportedOperationException(
				"No suitable EntryWriter found for " + url);
	}
}
